noun iso·oc·tane \ˌī-sō-ˈäk-ˌtān\

Definition of isooctane

  1. :  an octane of branched-chain structure or a mixture of such octanes; especially :  a flammable liquid octane used in determining the octane number of fuels

Origin and Etymology of isooctane

International Scientific Vocabulary

First Known Use: 1909

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